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I am trying to compute the moment of inertia of the Cavendish pendulum. I used

I = 2(m r^2)

r = gyration arm

m = the weight attached to the pendulum

But this formula is for a dumbell type of torsion pendulum where the weights are attached to the bar.

Does anyone know the formula for a pendulum where the weights are suspended as in the case of the Cavendish pendulum? I couldn't find it online.

With this formula I got

I = 2 ( 729.8 * 93.1^2) = 12,651,243.56 g cm^2

Does this sound right for a pendulum of this dimensions?

Thanks for your help.

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# Moment of Inertia of Cavendish pendulum

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